Carbureter.



E. FEROLDI.

CARBURETER.

APPLICATION FILED JUNE 1. 19l6.

1,253,949. Patented Jams, 1918.

jlalzeia for:

, bureter EN'RICO FEROLDI, 0F TUIRIN, ITALY.

CABB'URETER.

Specification of Letters Patent.

Patented Jan. 15, 1918.

Application filed June 1, 1918. SeIiaI No. 101,088.

To all whom it ma concern:

Be it known tl iat I, ENRICO FEROLDI, a the King of Italy, residing at Turin, Italy, have invented certain new and useful Improvements in Carburetors, of which the following is a specification.

This invention relates to carbureters for explosion engines and has for its object a carbureter comprising a main chamber, an auxiliary chamber and a single nozzle feeding both chambers, the auxiliary chamber being further able to operate either by itself or in conjunction with the main chamber according to running of engine.

This invention comprises also a particular construction of nozzle, main chamber and throttle valve, said construction being intended to improve the operation of the carbureter and reduce the fuel consumption.

The annexed drawing shows by Way of example one construction of the carbureter according to this invention; in said drawing Figure 1 is a central section of the carand Fig. 2 is a view showing in detail the hollow plug controlling the auxiliary chamber.

As shown in the drawing the carbureter comprises a tank 1 in which the fuel is fed through pipe 2 and hole 3 controlled by the spindle 4 which is operated in the usual manner by the float 5. Adjacent to said tank is arranged the carbureting chamber 16 which communicates with tank 1 by means of a passage 6 opening in a recess 7 of said chamber in which is located a holed sleeve 8. A [MP8 9 is mounted on the upper end of sleeve 8 and is provided at its upper end with a transverse wall 10 having a restrictsubject of ed opening 11; two sets of holes 12 and 13 inclined with regard to each other are provided in the wall' of pipe 9 above said partition. The said tube 9 canbe terminated at the top by a rim, the edge of which is zig-zag in cross section for the purpose of dividing the petrol, when, owing to excessive suction it overflows at the top of the tube 9. A sleeve '14 is located in the upper mouth of sleeve 8 so as .to form in said ipe 9 a chamber which is intended to be filled in by fuel pending the normal running.

of the engine.

Pipe 9 is encircled by a removable casing 15 having an enlarged head 15' arranged in the intermediate restricted portion of cham-- ber 16' which is connected at its upper end with the suction duct of the engine while its opposite end opens in the atmosphere.

The Wall of head 15 is provided with openings 17 causing the hollow of said head to communicate with chamber 16, and another hole 18 is made in said wall through which projects 'in it the mouth of plug 19 inclosing one pair of holes 12 and 13 of pipe 9. The plug 19 is located in a cylindrical seat made in the wall of chamber 16, in which opens passage 20 communicating with chamber 16 by means of holes 25 and 27; hole 25 is controlled by an adjustable screw 26 and is arranged above the throttle valve 24 while hole 27 is provided in such a position as to be shut by the edge of the valve 24.- when the same is closed. Another duct 20 opens in said seat and in the lower portion of chamber 16, and finally duct 20 having smaller section than duct 20 causes said seat to communicate with the hollow of chamber 16 under valve 24.

The plug 19 having a controlling head 19 which may be stopped in the required position by screw 23, is provided with a central cavity and two holes 21 and 22 intended to register with ducts 2 0 and 20"; finally a slot 21' is made in it which registers with duct 20. The holes 21 and 22 are arranged in such a manner as to not register both with the corresponding duct at the same time and slot 21 has such a length and position as to be able to be opened when hole 22 does not register with duct 20" The carbureter may be adjusted according to requirements by manipulating the plug so as to clear to the proper relative extent the holes 21 and 22 and slot 21 of the plug 19 and by adjusting the screw 26 controlling hole 25, the operation of said plug being as follows :-when slot 21 registers with duct 20 while hole 22 does not register with duct 20 the mixture supplied to the suction duct of engine by hole 22 and duct 20 is mixed with a given quantity of air taken in chamber 16 through duct 20 said chamber opening in the atmosphere as described. On the contrary when hole 22 is caused to register more or less with duct 20" the mixture is mixed with a further quantity. of air passing through said duct 20".

The duct 20 serves also to cause the suction exerted into chamber 16 when valve 24 is being opened, to act into theplug 19 in order to equalize the suction into the head 15 of casing 15 ezicircling the nozzle.

In order to bring the main carbureting chamber 16 into operation in a gradual manner, the valve 24 controlling the 'communication of said chamber with the suction duct of the engine has its wings displaced to such an angle with regard to each other that wing 24 is nearly perpendicular to the axis of chamber 16 While the other Wing 24 adjacent to hole 27 is inclined with regard to the axis of said chamber, the hole 27 being thus quickly uncovered when the valve 24-is operated.

The operation of the carbureter is as follows When valve 24 is closed the suction exerted by the engine acts, through hole 25, in duct 20 and thence fuel is supplied through holes 1213 of the nozzle encircled by mouth of plug 19 said fuel being mixed with air supplied either through duct 20 or through both duct 20 and duct 20" according to position of plug 19 as described. On valve 24 being opened the hole 27 is uncovered and suction increases in duct 20 and thereafter the main chamber 16 is brought into communication with suction duct of engine. Then an air current is caused to pass in said chamber and in the restricted annular orifice left in the same by head 15' and a suction is thus exerted into head 15 through holes 17 which causes the fuel to issue from all holes 12 and 13 of the nozzle 9. The nozzle holes 12 and 13 being inclined to each other the fuel sprays are mixed together and the atomized fuel issues from head 15' through holes 17 and is mixed with said air current,

The value of suction on the mouth of holes 12 and 13 depends upon the section of the restricted annular orifice left between wall of chamber 16 and head 15 and the same may be modified according to requirements by removing and substituting the casing 15'; this manipulation may be made in an easy manner as said casing 15 is mounted merely by friction on pipe 9.

As described when the valve 24 is opened the hole 27 is uncovered and suction increases in duct 20 and thus a uniform quantity of fuel issues from all holes 12 and 13.

The chambers provided in nozzle 9' by partition 10 and sleeve 14 are filled in by fuel reaching the level of the mouth of holes 12 as shown by a dotted line in Fig. 1; the supply of fuel is thus effected in a sufficient manner also when the engine is running with low speed, said supply being insured by capillary action of'holes 12 in addition to suction exerted by the engine. On the contrarg when the speed of the engine and hence t e suction are increasing beyond the proper value, the supply of fuel is not increased to the same extent, owing to the restricted orifices of sleeve 14 and partition 10, a too large supply of fuel being thus prevented.

Further when there is a strong suction in chamber 16 and head 15-a'portion of the air supplied by duct 20 is caused to pass into the nozzle by hole 22, plug 19 and holes 12 and 13 encircled by the mouth of said plug, in such a way as to reduce the supply of the fuel; the portion of air caused to interfere with the fuel supply may be adjusted by manipulating plug.l9. I

The carbureter according to this invention is able to feed the engine with the required quantity of mixture at the different speeds of the engine, and may be adjusted in an easy manner in accordance with the engine to be fed.

What I claim as my invention and desire to secure by U. S. Letters Patent is i 1. A carbureter for explosion engines comprising a main carbureting chamber, a valve controlling the communication of said chamber with the suction duct of the engine, an auxiliary carbureting chamber opening in said duct beyond said valve, a single nozzle in the main chamber, said nozzle having a plurality of peripheral spraying holes in its head, a pipe projecting into the main carbureting chamber and connecting a number of said holes with the auxiliary. chamber, openings in said pipe for feeding air in the auxiliary chamber, said pipe belng able to be displaced to adjust the clear section of said openings. 1

2. A carbureter for explosion engines comprising a main carbureting chamber, a valve controlling the communication of said chamber with the suction duct of the engine, an auxiliary carbureting chamber opening in said duct beyond said valve, a single nozzle in the main chamber, said nozzle having two sets of peripheral spraying holes, each hole of one set being inclined toward the adjacent hole of the other set, a pipe projecting into the main carbureting chamber and connecting a number of said holes with the auxiliary chamber, openings in said pipe for feeding air in the auxiliary chamber, said pipe being able to be displaced to adjust the clear section of said openings.

3. A carbureter for explosion engines comprising a main carbureting chamber, a valve plurality of peripheral spraying holes, a

pipe projecting into the main chamber and connecting a number. of said holes with the auxiliary chamber, openings in said pipe, a

duct connecting the main chamber with one of said openings, a duct registering with another of said openings and leading to the atmosphere, said pipe being able to be displaced to adjust the clear section of said openings.

4. A carbureter for explosion engines comprising a main carbureting chamber, a controlling throttle valve the wings of which are arranged at an angle to each other, one of said wings being substantially perpendicular to the Wall of the chamber when the valve is closed while the other wing is inclined in the direction of the rotation of the valve, an auxiliary carbureting chamber opening into the suction duct of the engine by a hole provided beyond said valve and by another opening being shut by the edge of the inclined Wing of the "alve when the same is closed, a single nozzle having a plurality of spraying holes in the main chamber, a pipe projecting into said chamber and connecting a number of said holes with the auxiliary chamber and adjustable means for feeding air in said pipe.

5. A carbureter for explosion engines comprising a main carbureting chamber, a valve controlling the communication'of said chamber with the suction duct of the engine, an auxiliary carbureting chamber opening in said duct beyond said valve, a single nozzle having a plurality of sprayin holes in said main chamber, a casing encirc ing the nozzle and having an enlarged head, openings in said head, a pipe projecting into said head and connecting a number of said spraying holes With the auxiliary carbureting chamber and adjustable means for feeding air in said pipe.

In testimony whereof I aflix my signature in presence of two Witnesses.

ENRICO FEROLDI.

Witnesses:

MARIO TORSAY, MARIO DELPORGIO. 

